// Panels
.panel-variant(@border, @heading-text-color, @heading-bg-color, @heading-border) {
    border-color: @border;
    &>.panel-heading {
        color: @heading-text-color;
        background-color: @heading-bg-color;
        border-color: @heading-border;
        +.panel-collapse>.panel-body {
            border-top-color: @border;
        }
        .badge {
            color: @heading-bg-color;
            background-color: @heading-text-color;
        }
    }
    &>.panel-footer {
        +.panel-collapse>.panel-body {
            border-bottom-color: @border;
        }
    }
}